时速: speed per hour...
温和: lukewarm...
给予: to accord, to give, to show (respect)...
突发: to burst out suddenly, sudden outburst...
充当: to serve as, to act as, to play the role of...
小学生: primary school student, schoolchild, beginner...
背心: sleeveless garment (vest, waistcoat, singlet, tank top etc)...
认可: to approve, approval, acknowledgment, OK...
隐约: vague, faint, indistinct...
开设: to offer (goods or services), to open (for business etc)...
